Boiler with superheater



B. BROIDO.

BOILER W |TH SUPERHEATER. APPLICATION FILED DEC. 31, 1917.

5 SHEETSSHEET I.

B. BROIDO. BOILER WITH SUPEHHEATER.

APPLICATION FILED 050 31, 1917.

1,363,71 4. Patented Dec. 28, 1920.

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BOILER. WITH, SUPERHEATER. APPLICATION FILED DEC. 31, 1917.

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B. BRO IDO.

BOILER WITH SUPERHEATER.

APPLICATION FILED DEC. 3?, 19]].

1,363,714. Patented Dec. 28, 192m 5 SHEETS-SHEET 4- IIIIIIIIIIIII/ln 7;Emmi/m EEO/PO alum 351 ///5 WW y y BENJAMIN BROIDO, OF NEW YUBK, N. Y.,ASSIGNOR T0 LOOOMO'IIVE SUPERHEATER COMPANY, OF YORK, N. 1., ACORPORATION OF DELAWARE.

BOILER WITH SUPERHEATER.

Application filed December 31, 1917.

To all whom it may concern.

Be it known that I, BENJAMIN Bnolno, a citizen of the United States,residing at New York, N. Y., have invented certain new and usefulImprovements in Boilers with Superheaters, of which the following is aspecification.

My invention relates to boilers, and has special reference to water tubeboilers equipped with superheaters. It has for its principal objects theprovision of a space for the superheater which shall be near the furnace where the gases striking the superheater have not been cooled;which shall be protected from direct radiation from the furnace; whichadmits of easy regulation of the amount of gases passing over the superheater; which shall be easily removable; and which shall utilize what isordinarily waste space. Besides these principal advantages secured by myinvention there are some minorones which will appear as the descriptionproceeds.

In the superheating art it is becoming more and more possible to employa high degree of superheat and thus attain the advantages which theoryshows are inherent in the use of steam superheated highly. This entailsa design of boilers in which the gases of combustion reach thesuperheater before they are cooled very far or at all by contact withthe relatively cold boiler surfaces. Superheaters placed near theolf-take flue, or even behind a bank of the tubes of a water tubeboiler, are unable to furnish the requisite degree of superheat, withoutbeing increased to inconvenient size.

I am aware that in water tube boilers of the type with which I am hereconcerned it has been proposed to locate the superheater in a placecorresponding roughly to the place employed by me. As illustration U. S.Patent 1,245,005, granted E. C. Meier on *Uctober 30, 1917, may beinstanced. The disadvantages in the arrangement there shown are that theradiation from the furnace strikes the unprotected superheater directly,and that regulation with a damper at the point shown is practically outof the question. These difliculties are overcome by the presentinvention.

In the accompanying drawings illustrating my invention, Figure 1 is alongitudinal Specification of Letters Patent.

Patented Dec. 28, 19241.

Serial No. 209,784.

section of a boiler of a well-known type embodying my invention; Fig. 2illustrates a modification, Fig. 3 being a fragmentary section on line3--3 of Fig. 2; Figs. 1, 5 and 6 are sections similar to Figs. 1 and 2,of other types of boilers with my invention apphed; Figs. 7 and 8 aretop and sectional news of Fig. 6 respectively, the section for F 8 beingtaken on line 8-8 of Fig. 6; F igs. 9 and 10 are views similar to Figs.7 and 8 of a modification.

Referring first to Fig. 1, the boiler setting is designated by 1, andwithin it is the boiler, which comprises an upper drum 2, a lower drum3, and banks of tubes 1, 5 and 6. A

baffle 7 is located in the fore part of bank 5, terminating short of theupper drum, and a battle 8 is located in the fore part of the bank 6,terminating short of the lower drum 3. Forward of the bridge wall 9 isthe furnace 10, forming a projecting portion in the boiler housing. 11is the steam pipe carrying away the steam from the upper drum. 12 is theflue by which the gases, after leaving the boiler, escape to thechimney.

As far as described the boiler is of ordinary construction. In such aboiler I place my superheater, which may be either of the constructionshown, or any preferred form, in the location indicated in the drawing.The arch 13, in lieu of being extended to close proximity of the bank oftubes 1, and being connected with it by a bafile, terminates somedistance forward of it; and some distance above it I place a second arch1 1, terminating short of the front wall 15 of the boiler. From theinner end of arch 14 the wall 16 extends upward, terminating at a pointsome distance from the top 17 of the housing. A baffle 18 closes thespace between wall 16 and the first of the tubes in bank 1.. The spacebetween the top of wall 16 andthe upper wall 17 of the housing can bepartly or wholly closed by means of a damper 19, which in the figure isshown in its upper position, but may be lowered by means of the rods 20,only one of which is visible in the figure. The pipe 11 carries thesteam to the superheater 21, andfrom the superheater it is conveyed bythe pipe 22. 7

The operation maybe described as follows: The products of combustion,leaving furnace 10, pass, in part, up between the 'tubes'of bank 4, overthe top of baffle 7,

' arches, 13 and 141, and,'after passing over the superheater, leave thechamber by way of the opening abovewall 16, rejoining the main currentof gases. The proportionate amount of'the gases passing through thesuperheater chamber can be controlled by the damper 19.

It will be clear that the arrangement proposed has the advantages abovepointed out. The superheater units are in no danger of being damaged bythe intense direct radiation from the furnace; yet the gases strikingthe superheater reach it without having been cooled by boiler surfaces;regulation is easy, and the damper isat a place where the heat is notintense enough to make its main tenance difficult. It happens at times,that arches becomeso far weakened that they fall. My second arch in sucha case protects the superheater sufficiently so it will not I be damageduntil repairs can be made.

The form of my invention shown in Fig. 2 is quite similar to that ofFig. 1. There is here, however, no wall between the super heater 21 andthe tubes of the first bank 4. N or is there a damper 19. Adjustment ofthe amount of gases, however, can here be made by placing-fire bricks 23on the lower arch in the opening between the two arches. These may bespaced, added to, or diminished in number ,to suit conditions. Access tothe passage for this purpose is permitted by the door 24:. Evidentlythis means of regulating the gas passage may be used 'in the form ofFig. 1 'in addition to the damper, for adjustment of a more permanentnature. Regulation. by this means is quite feasible with the boiler inoperation.

In Fig. 4 is shown a boiler of'another t pe with my invention applied.Here t ere are longitudinal top and. bottom drums 2 and 3 connected bybanks of tubes between which are baffles to direct the flow of thegases. There may be and inpracti'ce usually is, a plurality of drums 2and a corresponding number of lower drums 3 As far as the arrangementfor the super heater'is concerned, it may be practically a duplicate ofthe two first described. The figure shows one variation of importance,

7 and that is the inclination of the upper arch 14. His put at an anglesloping up toward the front in order to facilitate the flow of gasesinto the superheater chamber.

Another form of boiler is shown in Fig. 5. The characteristic of thisboiler of interest is that the first bank of tubes is set at a decidedangle to the vertical, andgenplaced the superheater 21. Lower arch 13and upper arch 14 correspond to the similarly designated parts in theearlier figures, and their functions are likewise similar. Gases fromthe furnacepass through the space between them, pass over thesuperheater, and rejoin the main current of gases.

Figs. 6 to 8 show a form of boiler with I cylindrical upper and lowerdrums with their axes vertical and the watertubes connecting bottom andtop ofthe drums. The housing in these boilers generally follows thecircular outline of the drums, as is shown in the top view, Fig. 7 andin the sectional view, Fig. 8. The Dutch oven furnace extends forward asindicated. I again place my superheater inthe space between the frontwall 15 and the partition 16. The two arches 13 and 1 1 are also againarranged as before. The open space above wall 16 is shown divided .intotwo parts by the column 30, and there are two dampers 19, only one ofwhich is illustrated. space above wall 16 is shown in Fig, 6, as thesection for this figure is taken on line 6-6 of Fig. 7 and isnot.entir-ely central. Instead of putting wall 16, superheater 21,

The 1' 3* and dampers, straight across, as just de- The action, of allthe forms of my invenf tion corresponds closely to that of the formfirst fully described, and will be too abvious to need furtherdescription.

It will be evident that my invention is susceptible of many variations.the forms of the invention shown-in Figs. 1

and 1, the arch 14 may extend inward beyond partition '16. In caseswhere the superheater is smaller than shown, the charm Thus, in I her inwhich it is located may be made to conform to its actual size bychanging the location of theupper arch or by shortening Such variationsthe chamber at the top. will occur in practice to any one skilled inthis art, but where they come within the spirit of the appended claims,I consider them part of my invention, and want it understood that theappended claims are meant toinclude them.v

What I claim as my invention is:

1. In apparatus of the class described, the combination of a lower andan upper drum, water tubes connecting them, a front wall, a partitionparallel to the front wall and between it and the water tubes, an archextending from the front wall inward and terminating some distance fromthe water tubes and below the lower end of the partition, a second archabove the first and extending from the partition to a point somedistance from the front wall, and a superheater in the space between thefront wall and the partition.

2. In apparatus of the class described, the combination of a boilercomprising a plurality of upright water tubes, at setting comprising afront and a top wall, a furnace, an arch over the furnace extending fromthe front wall inward and terminating some distance from the watertubes, a second arch above the first and extending from a point near thewater tubes toward the front wall and terminating short of it, apartition extending upward from the inner end of the upper arch andterminating short of the upper wall of the setting, a superheater lo-'cated in the space between the front wall and the partition, and adamper adapted to regulate the size of the opening above the partition.

3. In apparatus of the class described the combination of upright watertubes, a setting comprising a front wall parallel to the water tubes anda top wall, a furnace, an arch over the furnace extending from the frontwall inward and terminating some distance from the water tubes, a secondarch above the first and extending from a point near the water tubestoward the front wall and terminating short of it, the front wall havingan opening opposite the space between the two arches, and adjustablemeans accessible through said opening to restrict the passage betweenthe two arches.

a. In apparatus of the class described the combination of upright watertubes, a setting comprising a front wall parallel to the water tubes anda top wall, a furnace, an arch over the furnace extending from the frontwall inward and terminating some distance from the water tubes, a secondarch above the first and extending from a point near the water tubestoward the front wall and terminating short of it, a partition extendingupward from the inner end of the upper arch and terminating short of theupper wall of the setting, a superheater located in the space betweenthe front wall and the partition a damper controlling the opening abovethe partition, the front wall having an opening opposite the spacebetween the two arches, and adjustable means accessible through saidopening to restrict the passage between the two arches.

5. In apparatus of the class described, the combination of a wall, anarch extending at substantially right angles from said wall, a secondarch above the first and terminating at a point spaced from the wallthus providing a passage between the two arches and between the upperarch and the wall, and adjustable means comprising loose bricks placedin the passage to restrict it, the wall being provided with an openingpermitting access to the bricks.

BENJAMIN BROIDO.

